Centrifugal liquid-separator.



No. 872,173. PATENTED NOV. 26, 1907.

E. A. FORSBERG. CENTRIFUGAL LIQUID SEPARATOR.

APPLICATION FILED NOV. 26, 1905.

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E. A. FORSBBRG. CENTRIPUGAL LIQUID SEPARATOR.

APPLICATION FILED NOV. 25. 1905.

3 SHBETS-SHEET 2.

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GENIR IPUGAL LIQUID SEPARATOR. ABPLIUATION rmzn NOV. 25. 1905.

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this regulation is efl'ected either by varying the size of the orifices themselves.

devices have, however, certain drawbacks,

ERIK AUGUST FORSIHJRG, OF STOGKIIOLM,

QEPAItATOR, 0F STOC swnnnn, assicxos TO AKTIEBOLAGET KHOLM, swnnicx.

CENTRIFUGAL LIQUID-SEPARATOR.

Specification of Letters Patent.

Patented Nov. 26, 1907.

Application filed November 25. 1905. Serial No. 289.033.

To all whom it may concern:

Be it known that I, ERIK AreUs'r Fons- BERG, a subject of the King of Sweden, residingat Stockholm, Sweden, have invented a newand useful Improvement. in Centrifugal Liquid-Qeparators for Regulating the Relative Proportions of the Separated Liquid, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

In centrifugal machines for separating liquids of different specific gravity, and especially in milk separators, there is usually some device whereby the relative proportions of the liquids discharged may be regulated. In the constructions hitherto used,

the radial distance between the discharge orifice for the different liquids or by varying 'lhese which, especially in separators witha top disk, may prove considerable, and among which, apart from the constructional difliculties, the impossibility of varying the percentage of cream at the out-"flow of the liquids within wide limits, without a relatively great loss of work, is one of the principal.

The object of the present invention is to obtain an arrangement for regulating the cream, which at the same time enables a great variation of the percentage of cream and a free outlet for the different liquids.

In a liquid separator the unseparated liquid enters, as is well known, at the center and travels toward the periphery, the lighter liquidbeing separated and gathering towards the center, whence it moves upwardly and makes its egress through an outlet in the bowl-neck, while the heavier separated fluid gathers at the periphery and passes upwardly and inwardly along the wall of the bowl and escapes through openings in the bowl neck. During its passage inwardly towards its outlet, the heavier separated liquid constantly enters zones having decreasing peripheral speed. If no obstacles are present, such liquid will obviously strive to maintain its peripheral speed and thus at every point run more quickly than the drum, whereby the pressure occasioned by the centrifugal power of such liquid will become greater than that corresponding to the angular speed of the drum. '1 hus there arises a certain resistance against the motion ol the heavier separated liquid inwardly caused-by the gliding of the liquid, and the rapidity of the discharge of such liquid is reduced below what it would be it the said resistance were absent. This circumstance is, according to the present invention, made use of for regulating the relative proportions of the efliuent liquids by suitably inserting within the bowl, adjustable from outside, a resistance device in the way of the liquids, whereby the above mentioned gliding eilect is moreor less counteracted. That is, any portion of the inwardly moving separated heavier liquid that, in'its eilort to run at a speed exceeding the angular speed of the drum, meets this ad j ustable resistance device, will have its speed arrested and cut down to that of the angular speed ol" the drum, thus reducing the resistance against the motion of such liquid inwardlv caused by the gliding and consequently Facilitating its discharge. By adjusting the resistance device so that it may be in the path of a greater or less volume of such inwardly moving lir uid, the resistance against the motion ol the liquid inwardly caused by the gliding vi ill be more or less reduced and the rapidity ol' discharge of the heavier liquid more or less increased. It is obvious that to the extent that the rapidity of discharge of the heavier lluid is thus increased, the percentage of cream will be decreased.

In the drawings: Figures 1 to 9 inclusive are vertical sections through half the bowl illustrating various modified forms of. my invention. Figs. 10, 11, 12 and 13 are horizontal sections respectively on the line 1010 of Fig. 3, line 1111 of Fig. 5, line 12-12 of Fig. 7 and line 13-13 of Fig. 9.

In all the figures ac re resents the bowl, y ithe liner therein, and z t 1e upper plate of the inert In Fig. 1, the arrangement consists of an adjustable strip 9, placed between the inner wall ofthe bowl and the upper plate. The strip is connected to a screw it passing through the wall of the drum and movable in a slot 11 in the wall of the drum and which may be fixed in different positions by means of a nut h. A plate 1', is confined between the outside wall of the bowl and the nut and closes the slot at all positions of the strip.

' take different positions, thus .counteracting The higher up or the nearer the center the strip is placed, the greater will be the resistance offered to the gliding of the liquid, and

thus it is possible to regulate this effect and there-by also the proportion between the quantities of the outpouring liquids.

In Figs. 2 and 3, stripsk' are shown in the .s ace between the u er late and the bowl P P l P wall and fastened to t e up erplate or to the bowl Y wall.

the gliding more or less. In Fig. 3, another shutter, similarly constructed and operated,

is shown' but in this modification, the shutter ures, the regulating does not form a prolongation of the station.- ary strip, but is placed between two stationary strips. The resistance, caused by the stationary strips themselves, against the gliding, may thus be further regulated by turning the shutters Z more or less.

In Figs. 4 and 5, the constructions of Figs. 2 and 3 are modified by the substitution, for the shutters .Z, of screws m, rojecting throughthe wall of the bowl ancFturnable from the outside. In Fig. 4, the screw is arranged to constitute a prolongation of the stationary strip, while in Fig. 5 the screw is placed between two stationary strips.

In Figs. 6 and 7, still another modification is shown. In the construction of both figscrew or screws do not constitute any pro ongation of the station ary strips, as in Fig. .4, nor are they placed between these strips, asin Fig. 5, but they are placed in a free space, above the upper limit of the strips, obtained by providing the upper part of the conical bowl with a cylindrical collar In this there are one or more regulating screwsqn, one of which is shown as extending through the top wall 'of.

the collar into'the said free space and turnable from the outside so as to. shut off said space morev or less and thus regulate the gliding effect arising within said space. The regulating screws may be placed either in the same vertical plane as the stationary strips k, as shown in Fig, 6, or in a vertical plane extending between two stationary strips, as

' shown in Fig. 7.

In Figs. 8 and 9, the constructions of Figs.

6 and 7 are modified by the'substitution, for

the regulating screws n, of doors 0 secured to studs 0; projecting through the" top wall of the collar w and turnable from the outside.

In Fig. 8, the door is placed in the same vertical plane as the stationary strip 7r, while in In Fig. 2 is s own a shutter Z, located in line with and above, and forming a counteract the gliding effect caused by the difference of speed of the bowl and the separated liquid, and means enabling said resistance device to be adjusted from outside the bowl to vary its resistance, thereby en'ablin the relative proportions of the separated liquids to be. regulated. 2. In a centrifugal liquid separator, the combination with the bowl and its contained liner, of a resistance device, adaptedzto counterabt the gliding effect caused by the difference of speed of the bowl and the separated liquid, interposed in the space between the wall of the bowl and the liner, and means enabling said. resistance device to. be adjusted from outside the bowl to varyits resistance, thereby enabling the relative proportions of the separated liquids to be regulated.

3. In acentrifugal combination between the'bowl and its contained liner and top disk, of aresistance device, adapted to counteract the gliding effect caused by the difference in speed of the bowl liquid separator, the

space between the top disk ofthe liner and wall of the bowl, and means enabling said resistance device. to be adjusted from outside the bowl to vary its resistance, thereby enabling the relative proportions of the separated liquids to be regulated.

4. In a centrifugal liquid separator, the combination between the' bowl and its contained liner and top disk, of a resistance device comprising one or more stationary strips arranged in the space between the bowl and the top disk, and an adjustable member arrancged in the space above the upper limit of sai strip or strips, said resistance device being adapted to counteract the caused by the difference of spec of the bowl and the separated liquid and the adjustable member thereof by its adjustment enablin the relative proportions of the separated liquids to be regulated.

In testimony of which invention, I have hereunto set my hand, at Stockholm, on this 10th day of November, 1905.,

ERIK AUGUST FORSBERG.

Witnesses CARL FRIBERG, HARRY ALBIHN. 

